Elevator safety device.



J. WOLSKI. ELEVATOR SAFETY DEVICE.

APPLICATION FILED MAR. 15. 1915.

Patented Nov. 23, 1915.

3 SHEETS-SHEET I.

COLUMBIA PLANDGRAPH c0" WASljngnToN, D. c.

J. WOLSKI.

ELEVATOR SAFETY DEVICE.

APPLICATION man MAR. 15. 1915.

1 a Patented. NOV- 23, 1915- 3 SHEETSSHEET 2.

gwuem tom rlaifihi COLUMBIA PLANOGRAPH co.. WASHINGTON, D. c

.I. WOLSKI.

ELEVATOR SAFETY DEVICE.

APPLICATION mzo MAR. 15. ms.

Patented Nov. 23, 1915.

3 SHEETS-SHEET 3.

(OLUMBIA PLANOGRAPH co.,w,\sH|NGTON. n. c

J' GEN WOLSKI, OF CHICAGO, ILLINOIS.

ELEVATOR SAFETY DEVICE.

Specificationof Letters Patent.

Patented Nov. 23, 1915.

Application filed March 15, 1915. Serial' No. 14,369.

To all whom it may concern.

Be it known that I, J OHN VVoLsKI, subject of the Czar of Russia, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and usefulImprovements in Elevator Safety Devices, of which the following is a specification.

This invention relates to certain new and useful improvements in elevator safety devices. v

The primary object of this invention is the provision of an attachment carried by an elevator car and having the hoisting cable of the car secured thereto, the same having means releasable for engagement with members of the elevator shaft upon the severing of the cable.

A further object of the invention is to provide automatic catch mechanisms upon an elevator car, such mechanisms being retained in their inoperative positions during the normal position of the elevator cable and releasable for automatic engagement with the sides of the shaft upon the accidental break- 1 ing of the cable. 7

A still further object is to provide a safety means for an elevator adapted to automatically lock the car in its position in the shaft in the event of an accident to the hoisting cable, thus preventing the car from dropping to the bottom of the shaft and causing injury to the contents of the car.

With these general objects in view an others that will appear as the nature of'the invention is better understood, the same consists in the novel combination and arrangement of parts hereinafter more fully described, illustrated in the acompanying drawings, and pointed out in the appended claims.

In the drawings forming a part of this application and in which like designating characters refer to corresponding parts throughout the several views :Figure 1 is a front elevation of an elevator car with the device mounted thereon, and positioned between the shaft-beams, parts being broken away, and the car in its locked position. Fig. 2 is a top plan view thereof, with the elements shown as positioned when the cable is broken. Fig. 3 is a side elevational view of the resiliently mounted frame of the car bottom.

' Referring more in detail to the drawings, the side beams 10 of the elevator shaft are illustrated in the form of the usual metal I beams and provided with a cross piece 11 for supporting the elevator cable 12, while the elevator car 13 is vertically slidable between the shaft beams 10 and is provided with engaging brackets 14: at the opposite sides of the top and thebottom of the car which slidably engage the said shaft beams as best illustrated in ig. 2.

The top of the car is provided with a transverse girder 15, the upper ones of the aforementioned brackets 14 forming integral end portions thereof, while the said girder has central longitudinal slots 16 therethrough, and an angular locking lever 17 is pivotally mounted within each of said slots upon transverse pins 18.

The opposite outer ends of the levers 17 are provided with toothed feet 19 adapted to engage the inner faces of the aforementioned beams 10 during the actual operation of the present safety device.

A transverse yoke 20 is mounted upon the top of the car perpendicularly positioned with respect to the girder 15 and having its opposite ends connected to the center of the strips 21 which are arranged parallel to the girder 15 and adjacent the opposite sides of the *car top. A post 22 is carried by the girder 15 and is provided with a link 23, which receives the reduced ends 2 1 of the levers 17 'therethrough. The post 22 is slidably mounted through a central opening in the yoke 20 and has the supporting cable 12 of the elevator attached thereto, and where by it will be seen that when the car is supported by the said cable, the post 22 will be maintained above the girder 15 and with its opposite shoulders 25engaging'beneath the yoke 20 as illustrated in Fig. 3, and at which, times the feet 19 will be inoperatively main- 5 tained in their inward dis-engaging positions. 1

The engaging mechanism carried by the bottom 26 of the car is similar in operation and is of the form best illustrated in Fig. 4, such mechanism being partially inclosed within the housing 27 secured beneath the car bottom. The supporting frame illus trated in Fig. 6 is mountedbeneath the bottom or floor of the car by means of the vertically-extending corner posts 28 which are carried-within. the at the fo r corners thereof and project through the ear roof and through the strips 21 and are provided with cross-pins 29 in their upper ends above the said top strips. The lower ends of the corner posts are secured to the opposite side in the event of the hoisting cable becoming slackened or broken.

A bottom girder 32 is carried by the bottom housing 27 of the car and the lower brackets 14L consist of terminal integral extensions ofthe said girder. A longitudinal slot 33 provided in the girder 32 has lower 1 locking levers 32 pivoted therein as at 35 and provided with serrated outwardly projecting feet 36 at their free ends which are operatively similar-to the upper feet 19 and automatically engage the beams 10 upon a breaking of the hoisting cable.

A central connecting strip 37 is provided between the frame strips 30 and an upright post 38 is mounted in a central groove 39 of the said connecting strip. The post 38 is slidably positioned through a rectangular oentralperforation 40 of a block 41 which spans the slot 33, while the lower end of the post .38 is pivotally connected to the inner ends ofthe levers '34 by means of links 42.

By this arrangement, it will be seen that by holding the said frame in its elevated position, by the elevating cable, the lever feet 36 will be maintained in their inoperative'inwardly arranged positions and dis-engaged from the side beams 10.

From this detailed description of the device it will be seen that when the elevator cable l2is taut as normally insured by the weight of the car supportedthereby, the

- upper. locking feet 19 will be held disengaged and the yoke 20 will be held elevated, which will thereby hold the frame shown in Fig. 6 in position adjacent the car housing 27,.as shown in Fig. 3 and with the strips 31 under tension, while this position of the their disengaged f inward positions. dogs 43 will then also be positioned freely "Within the notches as also shown in Fig.

3. In the event of an accidental breaking of the cable 12, the strips 31 will be released and allowed to exert their expansive force, thus separating'the frame 30 to a point below the car, which brings the'top strips 21 down upon the car top and lowers the post 22 and the inner ends of the levers 17, thus I engaging the feet 19 against the inner faces of the beams 10 simultaneously with the engagement of the lower feet 36 therewith.

While the form of the invention herein shown and described is what is believed to be the preferred embodiment thereof, it is nevertheless to be understood that minor changes may be made without departing from the spirit and scope of the invention asset forth in the claims.

What I claim as new is 1. A device of the class described comprising a car, posts slidable vertically through the car, a frame secured to the posts, expansion springs between the frame and posts urging the latter downward, locklng levers pivoted to the car, links forming normally inoperative actuating means for said levers carried by said frame, a transverse yoke carried by the car and having slots therein, locking levers pivoted within the slots and having overlapping inner ends, opposed strips secured to the upper ends of said posts, a transverse yoke carried by said strips, a post slidable vertically through the yoke, a link carried by the lower end of the post and surrounding said lever ends for free movement relatim thereto, and a hoisting cable secured to the upper end of the last mentioned post.

2. A device of the class described, comprising a car, corner posts vertically mounted slidable through the said car, a frame secured to the lower ends of the said posts, expansion springs encircling the said posts, and positioned between the said frame and the floor of the car, locking levers pivoted beneath the bottom of the car, links forming normally inoperative actuating means for the said levers connected between the inner ends of the said levers and the central portion of the said frame, a transversegirder carried by the top of the car and having slots therein, locking levers pivoted within'the said slots and having reduced overlapping inner ends, opposite strips positioned above said car, and secured to the upperends of the said posts, a transverse yoke carried by the said strips and having a central perforation therethrough, a post slidably mounted through the said yoke perforation and having projecting shoulframe holds the lower locking feet 36 in The ders positioned beneath the said yoke, a link carried by the lower end of the said post, and freely surrounding said lever ends, and a hoisting cable for the car secured to the upper end of the said post.

'In testimony whereof I aflix my signature in presence of two witnesses.

JOHN VVOLSKIV Witnesses:

ALBERT VIELZUR, HELEN MLoDzILoowsnI.

Copies of. this patent may he obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

